BRPI1005256B1 - VEHICLE TYPE LAMBRET - Google Patents

Abstract

scooter vehicle. The present invention relates to a scooter type vehicle (10) in which the capacity of a fuel filter (57) can be freely adjusted without any restrictions imposed due to the rotary movements of a rotary type engine unit (33). ). a body structure (11) is provided with a link support bracket (16l) (23), and a front end (72) of a link (23) is attached to the link support bracket (16l) (23) . a rear end (73) of the link (23) is attached to a lower portion (74) of a crankcase (61). the fuel filter (57) is fitted in a support case (75), and the support case (75) of the crankcase (61). The fuel filter (57) is disposed on the underside of a connecting pipe (67) and in a position below an injector (58) in the vertical direction of the vehicle. The capacity of the fuel filter (57) can be freely adjusted without any restrictions imposed due to swings of the rotary type engine unit (33).

Description

Descriptive Report of the Invention Patent for VEHICLE TYPE LAMBRETA.

Technical Field [001] The present invention relates to an improvement in a scooter type vehicle, in particular, an improvement in the outline of a fuel filter supplied in a scooter type vehicle.

Background of the Technique [002] As a conventional scooter vehicle, one is known in which a fuel filter is provided in an intermediate portion of a fuel supply path to supply a reserved fuel in a fuel tank in a combustion chamber engine (see, for example, Patent Document 1 (figures 1 and 2)).

[003] As shown in Figure 1 of Patent Document 1, the scooter-type vehicle (10) (here and from now on in this document, the symbols in parentheses are reference symbols used in Patent Document 1) an oscillating-type engine unit (22) mounted with freedom of movement on a rear frame (135b) and a fuel tank (25) arranged under a step floor (24) on which the rider rides with his foot on the front side the engine (22).

[004] As shown in Figure 2 of Patent Document 1, the fuel in the fuel tank (25) is supplied through a conduit (321) to a fuel filter (34), in which the fuel is purified, before be supplied to the engine by a fuel pump (26).

[005] However, in the case where the fuel filter (34) is disposed on the rear side of the fuel tank (25) in the rear direction towards the front of the vehicle and in a space on the lower side of

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2/24 a main cylinder (308) and a main cover (311), as shown in Figure 1 of Patent Document 1, the oscillation of the oscillating type motor unit (22) causes the main cylinder (308) and the main cover (311) is swung up and down, such that the main cylinder (308) and the main cover (311) are close to the fuel filter (34).

[006] In order to guarantee a free gap between the fuel filter (34) and each one between the main cylinder (308) and the main cover (311), thus, approaching the fuel filter (34), a method can be verified in that the fuel filter (34) is made in smaller size. When the fuel filter (34) is made smaller, however, the cycle time of element replacement for the fuel filter can be reduced. Accordingly, there is a need for a scooter-type vehicle that the size of a fuel filter can be freely adjusted, with no restrictions imposed due to the oscillations of an oscillating-type engine unit.

Prior Art Document

Patent Document

Patent Document 1 [007] Japanese Patent Open to Public Inspection No. 2002206466

Summary of the Invention

Problem to be solved by the invention [008] It is an objective of the present invention to provide a scooter type vehicle in which the capacity of a fuel filter can be freely adjusted without any restrictions imposed due to the oscillations of an oscillating type engine unit.

Means to Solve the Problem [009] The invention, according to claim 1, consists of

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3/24 a scooter-type vehicle including a body frame, an oscillating motor unit supported with freedom of movement in the body frame via a link, a fuel tank supported in the body frame, a fuel supply path through which a fuel in the fuel tank is supplied to the oscillating type engine unit, and a fuel filter that is disposed in an intermediate portion of the fuel supply path and through which the fuel is purified, characterized by the fact that the link is attached to a lower portion of a crankcase of the oscillating type engine unit, and the fuel filter is arranged on an upper surface of the crankcase.

[0010] The invention, according to claim 2, is characterized by the fact that the oscillating type motor unit has a cylindrical part that protrudes from the crankcase towards the front side of the vehicle, and a discharge pipe extending from the cylindrical part towards the rear side of the vehicle through the bottom side of the crankcase.

[0011] The invention, according to claim 3, is characterized by the fact that an intake system is arranged on the upper side of the oscillating type motor unit; the intake system includes an intake tube connected to the cylindrical part and extending backwards from the cylindrical part, a throttle body connected to a rear portion of the intake tube, a connecting tube connected to a rear portion of the body butterfly and passing on the upper side of the crankcase, and an air filter connected to a rear portion of the connection pipe; and the fuel filter is arranged on the underside of the connecting pipe.

[0012] The invention, according to claim 4, is characterized by the fact that the scooter type vehicle has a petition holder 870180059714, of 11/07/2018, p. 7/35

4/24 luggage supported in a detachable manner over the body structure on the upper side of the intake system, and the fuel filter is arranged on an upper surface of the crankcase, with its longitudinal direction adjusted along the width of the vehicle; and the assembly and disassembly of the fuel filter can be carried out on the upper side of the vehicle when the boot is removed from the body structure.

[0013] The invention, according to claim 5, is characterized by the fact that the fuel filter is fitted in a support case, and the support case is mounted on the crankcase.

[0014] The invention, according to claim 6, is characterized by the fact that a fixing direction for fixing the support case to the crankcase is in the vertical direction of the vehicle, and a fixing part for fixing the support case to the The crankcase is located on the outer side of the connection pipe in the vehicle's wide direction.

[0015] The invention, according to claim 7, is characterized by the fact that a starter is extended over an upper surface of the crankcase, and the fuel filter is disposed on the upper surface of the crankcase, with its longitudinal direction adjusted along the longitudinal direction of the starter.

[0016] The invention, according to claim 8, is characterized by the fact that a filter prior to the pump through which the fuel in the fuel tank is purified, a filter prior to the pump disposed on the downstream side of the filter prior to pump, the fuel filter arranged on the downstream side of the fuel pump, and an injector for injecting fuel into the oscillating type engine unit, are arranged, in that order, in the fuel supply path; a pressure regulator, through the

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5/24 which part of the fuel is returned to the fuel tank when the fuel pressure between the fuel pump and the injector is taken to reach a predetermined pressure, it is supplied on the downstream side of the fuel filter; and the pressure regulator is adjusted in the support case along with the fuel filter.

[0017] The invention, according to claim 9, is characterized by the fact that the fuel filter is disposed in a position below the injector in the vertical direction of the vehicle.

Effect of the Invention [0018] According to the invention of claim 1, the link is fixed to a lower portion of the crankcase, thereby ensuring a space on the upper surface side of the crankcase, and the fuel filter is disposed on the surface of the sump by using space effectively. This ensures that the fuel filter is oscillated with the crankcase, and therefore the capacity of the fuel filter can be freely adjusted without any restrictions imposed due to oscillations of the oscillating type engine unit.

[0019] In addition, as long as the fuel filter is supplied on the upper surface of the sump, the fuel filter can be protected by the sump of loose stones, mud and the like that reach the underside of the vehicle.

[0020] According to the invention of claim 2, the discharge tube extends from the cylindrical part, and the discharge tube extends towards the rear side of the vehicle through the underside of the crankcase. As long as the fuel filter is arranged on the upper surface of the sump and the exhaust pipe is arranged on the bottom side of the sump, the heat transfer from the discharge pipe to the fuel filter will be contained by the sump.

[0021] According to the invention of claim 3, the system of

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6/24 intake is arranged on the upper side of the oscillating type engine unit, and the fuel filter is arranged on the lower side of the intake system connection pipe. Since the throttle body is a component that is comparatively larger in size in the radial direction of the intake passage, the space between the throttle body and the oscillating type motor unit tends to be narrow. In contrast, the connecting tube is smaller than the butterfly body in size in the radial direction. Therefore, a large space can be ensured between the connecting pipe and the sump, so that the capacity of the fuel filter can be produced in a larger size.

[0022] According to the invention of claim 4, the toll collapsible in a dismountable manner in the body structure is provided on the upper side of the intake system, the fuel filter is arranged on the upper surface of the crankcase, with its longitudinal direction adjusted along the vehicle's wide direction, and the fuel filter can be fitted and removed on the upper side of the vehicle when the boot is removed from the body structure. If the fuel filter is arranged with its longitudinal vertical adjustment direction, the amount of protrusion of the fuel filter from the upper surface of the crankcase will be large. In this connection, according to the present invention, the fuel filter is arranged with its longitudinal direction adjusted along the width direction of the vehicle, that is, horizontally adjusted, thereby the amount of protuberance of the fuel filter to from the upper surface of the sump can be suppressed in a small amount. As a result, it is possible to arrange the intake system and the tollgate as close as possible to the upper surface of the crankcase, and prevent the vehicle from being vertically enlarged.

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7/24 [0023] In addition, as long as access to the fuel filter can only be achieved by disassembling the luggage compartment, operations for assembling and disassembling the fuel filter in and from the crankcase can be facilitated.

[0024] According to the invention of claim 5, the fuel filter is mounted on the crankcase as it is housed in the support case. Although the fuel filter is then covered by the support case, the deposition of mud or the like on the fuel filter can be restricted.

[0025] According to the invention of claim 6, the support case with the fuel filter housed in it is fixed to the housing via the fixing part. In addition, the fastening part is arranged on the outside of the connection pipe in the vehicle's wide direction.

[0026] When inserting a tool in the direction of the fastening part, the tool can reach the fastening part without interference with the connecting tube, as long as the connecting tube is not arranged on the upper side of the fastening part. In this way, the insertion of the tool into the clamping part can be carried out easily, and operations for the assembly and disassembly of the fuel filter can be carried out easily.

[0027] According to the invention of claim 7, the fuel filter is arranged on the upper surface of the crankcase, with its longitudinal direction adjusted along the longitudinal direction of the starter. This ensures that the limited space on the top surface of the crankcase is used effectively, and the fuel filter and starter are extended while preventing the crankcase from being enlarged in size.

[0028] According to the invention of claim 8, the pressure regulator and the fuel filter are housed together in the case

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8/24 support. Therefore, as compared to the case where the pressure regulator and the fuel filter are supported separately, the number of component parts can be reduced and the cost reduction in parts can be planned.

[0029] According to the invention of claim 9, the fuel filter is arranged in a position below the injector. This makes it possible to suppress the possibility of fuel flowing from the injector due to the weight of the fuel accumulated in the fuel filter in case the vehicle remains parked for a long period of time.

Brief Description of the Drawings [0030] Figure 1 is a left side view of a scooter-type vehicle, according to the present invention.

[0031] Figure 2 is a side view of a fuel supply path arranged in a body structure.

[0032] Figure 3 is a plan view of the fuel supply path arranged in the body structure.

[0033] Figure 4 illustrates the mounting of a support.

[0034] Figure 5 is an exploded perspective view of a support case.

[0035] Figure 6 is a sectional view taken along line 6 - 6 of figure 3.

[0036] Figure 7 is a sectional view of a fuel filter. [0037] Figure 8 is a sectional view of a pressure regulator. Mode for Carrying Out the Invention [0038] A way for carrying out the present invention will be described below, based on the attached drawings. Incidentally, the drawings must be viewed according to the position of reference symbols, and the arrows (FRONT) in the drawings indicate the front side (forward direction) in relation to a vehicle.

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9/24

Modality [0039] First, a modality of the present invention will be described, based on the drawings.

[0040] As shown in figure 1, a scooter-type vehicle 10 such as a motorcycle has a body structure 11 that serves as a body structure thereof. The body structure 11 includes a main tube 12 which constitutes a front end portion thereof, a descending structure 13 extending below the main tube 12, a pair of lower left and right structures 14L and 14R (only the symbol 14L on the viewer side is shown) extending backwards from a lower portion of the descending structure 13, a pair of rear left and right structures 15L and 15R (only the 15L symbol on the viewer side is shown) extending to back and up from the rear portions of the lower structures 14L and 14R, and a pair of left and right link brackets 16L and 16R (only the 16L symbol on the viewer side is shown) attached to the intermediate portions of the rear structures 15L and 15R.

[0041] A front fork 17 is steerably mounted on the main tube 12, a front wheel 21 is mounted on the lower ends of the front fork 17, and a handle bar 22 is attached to the upper end of the front fork 17.

[0042] Furthermore, in this scooter-type vehicle 10, a power unit 24 is mounted vertically and oscillatingly on the link support clamps 16L and 16R through a link 23, and a rear shock unit 25 is bridged between a rear end portion of the power unit 24 and a rear end portion of the rear structure 15L.

[0043] A pair of 26L and 26R left and right floor tubes (only the 26L symbol on the side of the viewer is shown) that

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10/24 extends from the front to the rear of the vehicle is provided on the upper side of the lower structures 14L and 14R. On the upper side of the 26L and 26R floor tubes, a step 27 floor on which the driver supports his foot is provided along the 26L and 26R floor tubes. The lower frames 14L and 14R are provided with a floor tube support 28 to support the floor tubes 26L and 26R, and a fuel tank support 32 to support the fuel tank 31. [0044] The power unit 24 comprises an oscillating type 33 motor unit which constitutes a front portion thereof, and a continuously variable transmission 34 integrally connected to a rear portion of the oscillating type motor unit 33. A rear wheel 35 is mounted on one portion rear of the continuously variable transmission 34.

[0045] An intake system 36 is arranged on the upper side of the oscillating type 33 engine unit. An exhaust system 37 is then arranged so that it extends towards the rear side of the vehicle through the lower side of the unit type 33 oscillating motor.

[0046] In addition, the scooter-type vehicle 10 has a removable luggage carrier 41 supported on the body structure 11 by means of fixing members 38, on the upper side of the intake system 36.

[0047] Incidentally, the symbol 42 denotes a seat, the symbol 43 denotes a lower seat cover for the lower side cover of the seat 42, the symbol 44 denotes a rear side cover, the symbol 45 denotes a front fender , symbol 46 denotes a wrist cover, symbol 47 denotes a front cover, symbol 48 denotes a leg shield, symbol 49 denotes a rear headlight, symbol 51 denotes a bumper and symbol 52 denotes a main support.

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11/24 [0048] Now, a fuel supply system and intake system 36 will be described below.

[0049] As shown in figure 2, the fuel supply system 53 of the scooter-type vehicle 10 has the fuel tank 31, and the fuel supply path 54 through which a fuel in the fuel tank 31 is supplied to the oscillating type engine unit 33. [0050] A filter prior to pump 55 through which the fuel in fuel tank 31 is purified, a fuel pump 56 disposed on the downstream side of the filter prior to pump 55, a filter fuel 57 which is disposed on the downstream side of the fuel pump 56 of which the pore size is thinner than that of the filter prior to the pump 55, and an injector 58 for fuel injection on the side of the oscillating type motor unit 33 , are arranged, in that order, on the fuel supply path 54.

[0051] The oscillating type 33 motor unit includes a crankcase 61 to adjust a crankshaft (not shown), and a cylindrical part 62 that protrudes from the crankcase 61 towards the front side of the vehicle. In addition, the cylindrical part 62 includes a cylinder block 63, a main cylinder 64, and a main cover 65, in that order, from the crankcase side 61.

[0052] The intake system 36 includes an air filter for cleaning air from outside, a connection tube 67 extending from air filter 66, a butterfly body 68 connected to connection tube 67, and a inlet tube 71 extending from butterfly body 68. Inlet tube 71 is connected to cylindrical part 62. More specifically, inlet tube 71 is connected to an upper surface of main cylinder 64.

[0053] The injector 58 is attached to the intake pipe 71, and fuel is supplied to the oscillating type 33 engine unit

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12/24 through injector 58.

[0054] The body structure 11 is provided with the link support bracket 16L, the front end 72 of the link 23 being fixed on the support bracket of the link 16L, and a rear end 73 of the link 23 is fixed in a portion bottom 74 of crankcase 61.

[0055] The fuel filter 57 is housed in a support case 75, and the support case 75 is mounted on an upper surface 76 of the crankcase 61. The fuel filter 57 is arranged on the underside of the connection pipe 66 and in a position below the injector 58 in the vertical direction of the vehicle.

[0056] In addition, the pore size of the fuel filter 57 and that of the filter before the pump 55 are produced in order to be different; specifically, fuel filter 57 is adjusted to be thinner than the filter prior to pump 55 in pore size. Therefore, even in the case where a fuel containing fine dust, such as ethanol, is used, fine dust that was not retained by the filter prior to pump 55 will be retained by fuel filter 57. Accordingly, such fuels such as ethanol can also be used. be used.

[0057] Fuel tank 31 is a container that has a structure in which an upper half of tank 78 with protrusion upwards is placed in a lower half of tank 77 with cavity downwards and the halves of the tank are joined to connect them on a flange part 79.

[0058] The fuel tank 31 is provided with an oil filling port extending upwards 81 in a posterior portion of the upper half of the tank 78, and the oil filling port 81 is fitted with a fuel cap 82 In addition, the fuel pump 56 inserted from above is mounted on a front portion of the upper half of the tank 78, and the fuel pump

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13/24 fuel 56 is supplied with the filter before the pump 55.

[0059] Now, the outline of the fuel supply system 53 and the fuel filter 57 in plan view will be described below.

[0060] As shown in figure 3, the fuel supply system 53 includes the fuel tank 31, the fuel supply path 54, a pressure regulator 85 connected between a fuel pipe 83 and a fuel pipe 84, and a return pipe 86 connected to pressure regulator 85 and the fuel tank 31. The fuel supply path 54 includes a fuel pipe 87 through which the fuel pump 56 mounted on the fuel tank 31 and the fuel filter fuel 57 are connected together, and fuel pipes 83 and 84 through which fuel filter 57 and injector 58 are connected together.

[0061] Incidentally, pressure regulator 85 is a component through which part of the fuel is returned to the fuel tank 31 through the return pipe 86 when the fuel pressure between the fuel pump 56 and the injector 58 in the course fuel supply 54 is increased to achieve a predetermined pressure.

[0062] Fuel tube 87 is connected to fuel pump 56 at one end of it and to fuel filter 57 at another end of it. In addition, an intermediate portion of the fuel pipe 87 is held by a pipe holder 88 provided in the main cover 65.

[0063] Fuel pipe 83 is connected to fuel filter 57 at one end of it and to the upstream side of pressure regulator 85 at the other end of it.

[0064] The fuel pipe 84 is connected to a branched side

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14/24 upstream of pressure regulator 85 at one end of it and injector 58 at the other end of it. This ensures that the fuel in the fuel tank 31 is supplied through the injector 58 to the side of the oscillating type motor unit 33.

[0065] The return tube 86 is connected to the pressure regulator 85 at one end of it and to an upper surface of the fuel tank 31 at the other end of it. In addition, an intermediate portion of the return tube 86 is held by a tube holder 89 provided in the main cover 65.

[0066] The fuel filter 57 housed in the support case 75 is arranged on the upper surface 76 of the crankcase 61 so that its longitudinal direction is adjusted along the width direction of the vehicle. The fixing parts 91 and 92 for fixing the support case 75 to the housing 61 are located on the outer parts of the connection tube 67 in plan view. This ensures that when the luggage compartment 41 is disassembled from the body structure 11, the assembly and disassembly of the fuel filter 57 can be conducted on the upper side of the vehicle. Incidentally, the luggage rack 41 is mounted on the box support parts 93 of the body structure 11 via fastening members 38.

[0067] In addition, the starter 94 is disposed on the upper surface 76 of the crankcase 61. The fuel filter 57 is disposed on the upper surface 76 of the crankcase 61 so that its longitudinal direction is adjusted along the longitudinal direction of starter 94.

[0068] Incidentally, the symbol 95 denotes a shield plate provided in connection tube 67. Shield plate 95 protects the fuel filter 57 from stones, mud and the like thrown by the rear wheel 35.

[0069] In addition, a pipe made up of pipes

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15/24 fuel 87, 83 and 84 extending from the fuel tank 31 to the injector 58 is formed in a substantially U shape. [0070] Thus, the pipeline composed of the fuel pipes 87, 83 and 84 is formed in a substantially U-shape, and the pipeline composed of the fuel tubes 87, 83 and 84 is produced so as to be long. This ensures that, even when the proportions of ethanol and gasoline are varied due to fuel supply in the event that a fuel mixed with ethanol is used, the fuel pipes 87, 83 and 84 extending from the fuel tank 31 to the injector 58 are filled with fuel before the change in the proportions of ethanol and gasoline, and that an ECU already knows the proportions. Therefore, a better fuel injection to start the oscillating-type engine unit 33 can be performed, such that the oscillating-type engine unit 33 can be started favorably. After the start, the ECU recognizes the change in proportions, based on information from an O2 sensor, and an excellent fuel injection for the current proportions of ethanol and gasoline can be performed.

[0071] Now, the assembly of a support to support the discharge system 37 and the support case 75 will be described below.

[0072] As shown in figure 4, the exhaust system 37 includes a discharge pipe 96 that extends from the cylindrical part 62 (specifically, a lower surface of the main cylinder 64) towards the rear side of the vehicle through the lower side of the crankcase 61, and a shock absorber 97 connected to the discharge pipe 96.

[0073] The support 101 for supporting the support case (symbol 75, figure 3) includes a flat plate part 102, a first inclined part 103 and a second inclined part 104 which are inclined from the flat plate part 102, a mounting hole 105 provided in the first inclined portion 103, nuts 106 welded to the

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16/24 second inclined part 104, and nuts 107 welded to the flat plate part 102.

[0074] The mounting of the support 101 in the crankcase 61 will be described.

[0075] On the side of the first inclined part 103, a screw 108 passes through the mounting hole 105, and is screwed into a mounting hole 111 in the starter 94, by means of which the first inclined part 103 is fixed together with the starter 94. On the side of the second inclined part 104, the screws 112 pass through the mounting holes 113 provided in the housing 61, and are fixed on the nuts 106.

[0076] As a result, support 101 is mounted on the casing 61.

[0077] Now, the assembly of the fuel filter 57 and the pressure regulator 85 will be described below.

[0078] As shown in figure 5, the support case 75 includes a case 114, a cover 115 and rubbers 116.

[0079] Case 114 includes an oil filter arrangement part 117 for arranging oil filter 57, a pressure regulator arrangement part 118 for arranging pressure regulator 85, parts designed 121 to be mounted on support 101 , through holes 122 provided in the projected parts 121 and pins 124 in the hinge parts 123.

[0080] In addition, the case 114 is provided with a groove 135 through which the fuel pipe passes (symbol 87, figure 3), a groove 136 through which the fuel pipe passes (symbol 84, figure 3), and a groove 137 through which the return tube passes (symbol 86, figure 3).

[0081] The cover 115 includes a cover body 125, projected parts 126, through holes 127 provided in the projected parts 126, J-shaped hooks 128, a groove 131 through which the fuel pipe passes (symbol 87, figure 3 ), a groove

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132 through which the fuel pipe passes (symbol 84, figure 3), and a groove 133 through which the return pipe stops (symbol 86, figure 3).

[0082] When assembling, oil filter 57 and pressure regulator 85 are sandwiched between rubbers 116, and these, in sandwiched state, are arranged respectively in the oil filter 117 and the regulator pressure gauge 118.

[0083] Then cover 115 is placed on oil filter 57 and pressure regulator 85 so as to engage hooks 128 of cover 115 on pins 124 of case 114.

[0084] Then, the fastening members 134 pass through the through holes 127 and through the through holes 122, and are fixed (screwed) on the nuts 107 of the support 101.

[0085] As a result, fuel filter 57 and pressure regulator 85 are housed together in support case 75.

[0086] Now, the mounted condition of the support case 75 will be described below, using a sectional view.

[0087] As shown in figure 6, the fuel filter 57 is housed in the support case 75 in the sandwiched state between the rubbers 116. The hooks 128 are engaged on the pins 124, and, on the opposite side, the projected parts 126 and the the projected parts 121 are fixed to the support 101 through the fixing members 134. The support of the cover 115 in the case 114 and the assembly of the support case 75 in the support 101 can, therefore, be carried out using the common fixing members 134 , through which a reduction in the number of component parts can be achieved. [0088] Now, the fuel filter 57 will be described below.

[0089] As shown in figure 7, fuel filter 57 includes a filter case 141, and a filter assembly 142 housed in the

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18/24 filter case 141.

[0090] The filter case 141 includes a case body 143 in the form of a bottom cylinder, and a case cover 144 for closing and opening the case body part 143.

[0091] The case body 143 has a fuel suction port 145 which is connected to the fuel pipe (symbol 87, figure 3) on the side of the fuel tank (symbol 31, figure 3) and through which the fuel is sucked, and the case cover 144 has a fuel discharge port 146 which is connected to the fuel pipe (symbol 83, figure 3) on the side of the injector (symbol 58, figure 3) and through which the fuel is discharged.

[0092] The filter assembly 142 consists of a cylindrical filter 147 made of filter paper, and frame bodies 148 and 151 to support both ends of the filter 147. The filter assembly 142 is fixed in the state it is in. about to be stuck between the case body 143 and the case cover 144.

[0093] Fuel is sucked through the fuel suction port 145 into filter housing 141, and passes through filter 147 so that it flows from an outer peripheral surface 152 of filter 147 to an inner peripheral surface 153 of the filter 147, during the time it is filtered, and then the filtered fuel is discharged through the fuel discharge port 146 out of the filter case 141.

[0094] Now, pressure regulator 85 will be described below.

[0095] As shown in figure 8, pressure regulator 85 includes a case 156 that has a first case made of resin 154 and a second case made of resin 155 joined together, a spherical valve element made of steel 158 to open / close a communication hole 157 opened in a bottom on one end side of the case 156, a spiral compression spring 161 to induce a

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19/24 valve element 158 in one direction to close the communication port 157, a fuel suction port 162 in which the communication port 157 is opened, a fuel discharge port 163 formed in an intermediate portion of the port fuel suction 162, and a fuel return port 165 provided with a communication port 164 opened at the bottom on the other end of the case 156.

[0096] The fuel suction port 162 is connected to the fuel filter (symbol 57, figure 3) through the fuel pipe 83, while the fuel discharge port 163 is connected to the injector (symbol 58, figure 3) through the fuel pipe 84, and the fuel return port 165 is connected to the fuel tank (symbol 31, figure 3) through the fuel pipe 86.

[0097] As shown in figures 1, 2 and 3 above, the scooter type 10 includes the body structure 11, the oscillating type motor unit 33 sustained with freedom of movement in the body structure 11 through link 23, the fuel tank 31 supported on body structure 11, the fuel supply path 54 through which the fuel in the fuel tank 31 is supplied to the oscillating type engine unit 33, and the fuel filter 57 which is arranged in an intermediate portion of the fuel supply path 54 and through which the fuel is purified. In the scooter-type vehicle 10, link 23 is mounted on a lower portion of the crankcase 61 of the oscillating type 33 engine unit, and the fuel filter 57 is disposed on the upper surface 76 of the crankcase 61.

[0098] With this configuration, link 23 is attached to the lower portion 74 of the crankcase 61, thus ensuring a space on the side of the upper surface of the crankcase 76, and the fuel filter 57 is arranged

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20/24 on the upper surface 76 of the crankcase 61 through the use of that space effectively. As a result, the fuel filter 57 is oscillated together with the crankcase 61. Therefore, the capacity of the fuel filter 57 can be freely adjusted without any restrictions imposed due to oscillations of the oscillating type 33 motor unit.

[0099] In addition, since the fuel filter 57 is provided on the upper surface 76 of the crankcase 61, the fuel filter 57 can be protected by the crankcase 61 from loose stones, mud and the like that reach the underside of the vehicle.

[00100] As shown in figures 1 and 4 above, the oscillating type motor unit 33 includes the cylindrical part 62 projected from the crankcase 61 towards the front side of the vehicle, and the discharge pipe 96 extending from from the cylindrical part 62 towards the rear side of the vehicle through the bottom side of the crankcase 61.

[00101] With this configuration, the fuel filter 57 is arranged on the upper surface 76 of the crankcase 61, and the exhaust pipe 96 is arranged on the lower side of the crankcase 61, such that the heat transfer from the discharge pipe 96 to the fuel filter 57 is restricted by the crankcase 61.

[00102] As shown in figures 1 and 2 above, the intake system 36 is arranged on the upper side of the oscillating type 33 motor unit, and the intake system 36 includes the intake pipe 71 connected to the cylindrical part 62 and extending from the cylindrical part 62, the throttle body 68 connected to a rear portion of the intake tube 71, the connecting tube 67 connected to a rear portion of the throttle body 68 and passing through the upper side of the crankcase 61, and the air filter 66 connected to a rear portion of the connection pipe 67. The fuel filter 57 is arranged on the underside of the connection pipe 67.

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21/24 [00103] In this configuration, the space between the throttle body 68 and the oscillating type 33 motor unit tends to be a narrow space, since the throttle body 68 is a comparatively larger component in size in the radial direction of the admission ticket. In contrast, the connection tube 67 is smaller than the butterfly body 68 in radial size, so that a large space can be ensured between the connection tube 67 and the crankcase 61, and the capacity of the fuel filter 57 can be extended accordingly.

[00104] As shown in figures 1, 2, 3 and 4 above, the scooter-type vehicle 10 has a structure in which the luggage carrier 41 is demountable on the body structure 11 is arranged on the upper side of the intake system 36 , and the fuel filter 57 is arranged on the upper surface 76 of the crankcase 61, with its longitudinal direction adjusted along the width direction of the vehicle, such that the assembly and disassembly of the fuel filter 57 can be carried out on the upper side of the vehicle when the luggage compartment 41 is disassembled from the body structure 11.

[00105] If the fuel filter 57 is arranged with its longitudinal direction adjusted vertically, the amount of protuberance of the fuel filter 57 from the upper surface 76 of the crankcase 61 may be greater. In connection with this point, in the present invention, the fuel filter 57 is arranged with its longitudinal direction adjusted along the width of the vehicle, that is, adjusted horizontally, so that the amount of protuberance of the fuel filter 57 from of the upper surface 76 of the crankcase 61 can be suppressed in a smaller amount. As a result, the intake system 36 and the luggage rack 41 can be adjusted as close as possible to the upper surface of the crankcase 76, and the vehicle can be prevented from being extended vertically.

Petition 870180059714, of 7/11/2018, p. 25/35

22/24 [00106] In addition, as long as the access to the fuel filter 57 is secure only by dismantling the trunk 41, operations for the assembly and disassembly of the fuel filter 57 in and from the crankcase 61 may be facilitated.

[00107] As shown in figures 2, 3, 5 and 6 above, the fuel filter 57 is fitted in the support case 75, and the support case 75 is mounted in the crankcase 61.

[00108] In this configuration, the fuel filter 57 is covered with the support case 75 and, therefore, the deposition of mud or similar on the fuel filter 57 can be prevented.

[00109] As shown in figures 3 and 5 above, the fixing direction when fixing the support case 75 in the crankcase 61 is in the vertical direction of the vehicle, and the fixing parts 91 and 92 for fixing the support case 75 in the crankcase 61 are located on the outer sides of the connection tube 67 in the width direction of the vehicle.

[00110] With this configuration, when inserting a tool in the direction of the fastening parts 91 and 92, the tool can be inserted to reach the fastening part without interference with the connection tube 67, as long as the connection tube 67 is not present on the upper side of the fastening part. Thus, it becomes easier to insert the tool into the clamping part, so that the operations for assembling and disassembling the fuel filter 57 are easily carried out.

[00111] As shown in figures 2 and 3 above, the starter 94 is disposed on the upper surface 76 of the crankcase 61, and the fuel filter 57 is disposed on the upper surface 76 of the crankcase 61 so that its longitudinal direction be adjusted along the longitudinal direction of the starter 94.

[00112] With this configuration, the limited space on the upper surface of the crankcase 76 can be used effectively and the filter

Petition 870180059714, of 7/11/2018, p. 26/35

Fuel 57 and starter 94 can be extended while preventing the crankcase 61 from being enlarged in size.

[00113] As shown in figures 3 and 5 above, the filter before the pump 55 through which the fuel in the fuel tank 31 is purified, the fuel pump 56 disposed on the downstream side of the filter before the pump 55, the filter fuel 57 arranged on the downstream side of the fuel pump 56, and the injector 58 for fuel injection in the oscillating type engine unit 33 are arranged, in that order, in the fuel supply path 54, the pressure regulator 85 through of which part of the fuel is returned to the fuel tank 31 when the fuel pressure between the fuel pump 56 and the injector 58 is increased to reach a predetermined pressure is supplied on the downstream side of the fuel filter 57, and the regulator pressure sensor 85 is housed in support case 75 together with fuel filter 57.

[00114] This configuration makes it possible to reduce the number of component parts and plan a reduction in the cost of parts, when compared to the case where the pressure regulator 85 and the fuel filter 57 are supported separately.

[00115] As shown in figure 2 above, the fuel filter 57 is disposed in a position below the injector 58 in the vertical direction of the vehicle.

[00116] This configuration ensures that the fuel can be prevented from escaping from the injector 58 due to the weight of the fuel accumulated in the fuel filter 57 in case the vehicle remains parked for a long period of time.

[00117] Incidentally, the present modality is not limited to the scooter-type vehicle 10 in which an engine that uses gasoline as fuel is mounted. The modality can be applied to a scooter-type vehicle 10 in which an oscillating motor unit 33

Petition 870180059714, of 7/11/2018, p. 27/35

24/24 that uses a biofuel like ethanol as fuel is assembled [00118] Industrial Applicability [00119] The present invention is preferable for application in a scooter type vehicle in which a fuel filter is supplied outside a fuel tank.

Claims (8)

1, characterized by the fact that the oscillating type motor unit (33) has a cylinder part that protrudes from the crankcase (61) towards the front side of the vehicle, and a discharge tube (96) that extends from the cylinder part to the rear side of the vehicle through the bottom side of the crankcase (61). 1. Scooter type vehicle (10) characterized by the fact that it comprises a body structure (11), an oscillating type motor unit (33) supported oscillatingly in the body structure (11) through a link (23) , a fuel tank (31) supported on the body structure (11), a fuel supply path (54) through which a fuel from the fuel tank (31) is supplied to the oscillating type engine unit (33 ), and a fuel filter (57) which is arranged in an intermediate part of the fueling path and through which the fuel is purified, where the link (23) is fixed to a lower portion (74) of a crankcase ( 61) of the oscillating type engine unit (33), and the fuel filter (57) is arranged on an upper surface (76) of the crankcase (61). 2/3 (61), and an air filter (66) connected to a rear portion of the connecting tube (67); and the fuel filter (57) is arranged on the underside of the connection pipe (67). 2, characterized by the fact that: an intake system (36) is arranged on the upper side of the oscillating type motor unit (33); the intake system (36) includes an intake tube connected to the cylindrical part and extending backwards from the cylindrical part, a butterfly body connected to a rear part of the intake tube, a connection tube connected to a portion throttle body and passing the upper side of the crankcase Petition 870180059714, of 7/11/2018, p. 29/35 2. Scooter-type vehicle (10), according to claim 3/3 the fuel filter (57) is arranged on the upper surface (76) of the crankcase (61), with its longitudinal direction adjusted along the longitudinal direction of the starter (94). 8. Scooter-type vehicle (10) according to claim 3, characterized by the fact that: the scooter-type vehicle (10) has a luggage carrier (41) which is removably supported on the body frame (11) on the upper side of the intake system (36), and the fuel filter (57) is arranged on a surface upper (76) of the crankcase (61), with its longitudinal direction adjusted along the direction of the vehicle width; and the assembly and disassembly of the fuel filter (57) can be carried out on the upper side of the vehicle when the trunk (41) is disassembled from the body structure (11). 3. Scooter type vehicle (10), according to the claim 4, characterized by the fact that the fuel filter (57) is fitted in a support case (75), and the support case (75) is mounted on the crankcase (61). 4. Scooter type vehicle (10), according to the claim 5, characterized by the fact that: the direction for attaching the support case (75) to the sump (61) is the vertical direction to the vehicle, and a fixing part for attaching the support case (75) to the sump (61) is located on the outer side of the tube connection (67) in the direction of the vehicle width. 5. Scooter type vehicle (10), according to the claim 6, characterized by the fact that: a starter motor (94) is arranged on an upper surface (76) of the crankcase (61), and Petition 870180059714, of 7/11/2018, p. 30/35 6. Scooter type vehicle (10), according to the claim 7, characterized by the fact that: a pre-pump filter (55) through which the fuel in the fuel tank is purified, a fuel pump (56) disposed on the downstream side of the pre-pump filter (55), the fuel filter (57) in the downstream side of the fuel pump (56), and an injector (58) for fuel injection in the oscillating type pump unit are arranged in this order in the fuel supply path; a pressure regulator (85) whereby part of the fuel is returned to the fuel tank (31) when the fuel pressure between the fuel pump (56) and the injector (58) is increased to reach a predetermined pressure is provided on the downstream side of the fuel filter (57); and the pressure regulator (85) is fitted in the support case (75) with the fuel filter (57). 9. Scooter type vehicle (10), according to claim 7. Scooter type vehicle (10), according to the claim 8, characterized by the fact that the fuel filter (57) is arranged in a position lower than that of the injector (58) in the vertical direction of the vehicle.